German Research Institute for Public Administration Speyer

Speyer, Germany

German Research Institute for Public Administration Speyer

Speyer, Germany

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Wirtz B.W.,German University of Administrative science Speyer | Gottel V.,German Research Institute for Public Administration Speyer
Journal of Electronic Commerce Research | Year: 2016

Technology acceptance of information systems has been investigated widely in both empirical and meta-studies of different contexts. Yet, in the case of technology acceptance regarding social media, there is a lack of comprehensive literature reviews of hitherto existing empirical, multivariate studies. This is surprising given social media's meaning for individuals and society, as well as the accordingly high level of user acceptance. We review empirical research using structural equation modeling or multiple regression regarding technology acceptance in social media. Since the technology acceptance model (TAM) and the related constructs Perceived Ease of Use (PEOU), Perceived Usefulness (PU) and Subjective Norm (SN) are the most predominant ones in related studies, these represent the essence of this literature review. We identify 35 studies and review the variables used with regard to their treatment as independent or dependent, as well as their relationships with other constructs in different thematic contexts of social media. We find both similarities and differences concerning the original TAM as well as TAM 2 and 3. Most strikingly, the priorities concerning PEOU, PU and SN seem to change. Overall, PEOU together with its impact on constructs like Perceived Enjoyment is of greater importance in social media acceptance than PU, whereas SN and related constructs take center stage. Some researchers, for example, also extend the quality observation parameters of DeLone and McLean [2003] in the social media context by adding a social component or quality. In addition, we identify a wealth of new variables, which both influence and are influenced by PEOU, PU and SN in the social media context.


Jansen D.,German Research Institute for Public Administration Speyer | Jansen D.,German University of Administrative science Speyer | von Gortz R.,German Research Institute for Public Administration Speyer | Heidler R.,German Research Institute for Public Administration Speyer
Scientometrics | Year: 2010

In this paper the relationship between knowledge production and the structure of research networks in two scientific fields is assessed. We investigate whether knowledge production corresponds positively or negatively with different types of social network structure. We show that academic fields generate knowledge in different ways and that within the fields, different types of networks act as a stimulant for knowledge generation. © Akadémiai Kiadó, Budapest, Hungary 2009.


Wirtz B.W.,German University of Administrative science Speyer | Piehler R.,German Research Institute for Public Administration Speyer | Ullrich S.,German Research Institute for Public Administration Speyer
Journal of Electronic Commerce Research | Year: 2013

The technologies and functions of social media have significantly changed interaction on the Internet. These changes affect the perceived attractiveness of websites. Prior research regarding classic Internet offers has only partly considered these specifics. The determinants of attractive social media websites and corresponding online instruments remain under-investigated. Therefore, this study describes a conceptualization of website attractiveness in the context of social media and its relevance for potential usage. The research model was empirically tested by a standardized user survey (n=237) with the help of a structural equation model. The results show that social media website attractiveness is determined by the 2nd-order dimensions interaction orientation, social networking and user-added value. Moreover, a link to the intention to use social media offers can be established. Overall, the results shed light on the key aspects of users' expectations towards the integration of social media into electronic commerce and provide insights into how the corresponding social media instruments are to be evaluated.


Graafland J.,University of Tilburg | Hudson P.,VU University Amsterdam | Werner J.,German Research Institute for Public Administration Speyer
Journal of Environmental Planning and Management | Year: 2016

Corporate social performance (CSP) is assumed to have a positive impact on macroeconomic sustainability, but empirical evidence of this impact is absent in the literature. The objective of this paper is to investigate the macro impacts of CSP. We first establish a conceptual framework on the relationship between CSP at the individual business level and sustainability at the macro level. Next, we empirically test the relationship between (averaged) CSP scores and greenhouse gas emissions at the macro level for 22 countries during 2004–2011. We use Granger causality tests to check for Granger causality. The estimation results show that CSP reduces greenhouse gas emissions, but the long-term effect is rather modest. © 2015 University of Newcastle upon Tyne.

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